Enhanced rates of photocatalytic degradation of an azo dye using SnO{sub 2}/TiO{sub 2} coupled semiconductor thin films
- Indiana Univ. Northwest, Gary, IN (United States)
- Univ. of Notre Dame, IN (United States)
We present here for the first time the results from electrochemically assisted photocatalytic experiments using coupled TiO{sub 2}/SnO{sub 2} semiconductor thin films in the degradation of textile dye effluent. We show that by using such a system the oxidative efficiency of photocatalytic semiconductor systems in degrading a commercial azo dye such as Acid Orange 7 (AO7) can be improved. The results presented here on the decolorization of the azo dye AO7 represents a major step forward in the development of new advanced oxidation processes for the treatment of such industrial waste. The improved charge separation as a result of coupling two semiconductor systems with different energy levels and the applied anodic bias is responsible for the enhancement in the rate of photocatalytic degradation. 20 refs., 6 figs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 28689
- Journal Information:
- Environmental Science and Technology, Vol. 29, Issue 3; Other Information: PBD: Mar 1995
- Country of Publication:
- United States
- Language:
- English
Similar Records
Photocatalytic approach for the reductive decolorization of textile azo dyes in colloidal semiconductor suspensions
Environmental photochemistry on semiconductor surfaces: Photosensitized degradation of a textile azo dye, Acid Orange 7, on TiO{sub 2} particles using visible light